CHASSIS LD21B
SERVICE MANUAL
READ THE SAFETY PRECAUTIONS IN THIS MANUAL
http//aic.lgservice.com
CONTENTS
SAFETY PRECAUTIONS
SERVICING PRECAUTIONS
SPECIFICATION
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
SERVICING PRECAUTIONS
Electrostatically Sensitive ES Devices
IC Remove/Replacement
Replacement
Small-Signal Discrete Transistor Removal/Replacement
Removal
SPECIFICATION
4. Model General Specification
1. Application range
3. Test method
Specification
Symbolrate 4.0Msymbols/s to 7.2Msymbols/s
symbolrate
DVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s
5. Video resolutions 2D
5.1. Component Input Y, CB/PB, CR/PR
5.2. RGB Input PC - LS35/LS34/CS46 series models are not supported
5.3. HDMI InputPC/DTV
PCDVI
ADJUSTMENT INSTRUCTION
Boot file Download
1. Application Range
2. Designation
3.1. ADC Process
3.3. EDID data
3.2. EDID Download
7. ADC Calibration
4. Total Assembly line process
4.1. Adjustment Preparation
3.4 Function Check
4.3. Outgoing condition Configuration
6.1. Signal Table
5. HI-POT Test
6. Model name & Serial number D/L
7. MAC Address & CI+ key download
6.3. Method & notice
7.1 MAC Address
GP4LOW
7.2 LAN Inspection
7.3. LAN PORT INSPECTIONPING TEST
SCREW ASSEMBLY WORKING GUIDE
Screw specification and application situation
Only for training and service purposes
ח ͷͲͳͤͤͤͪͥͣ͢͡ ͙;ͤ͛ͽͥͦ͑͟͝ͳͼ͑͝;ΒΔΙΚΟΖ͚ ח ͣ͢ͶͲ
Rear
Side
LG2111 A
IC101
Applied Model **LM580T, **560T, **LS350T, **CS460T
Rear
Side
LG2111 A
560S, **LS350S, **CS460S
Rear
Side
LG2111 A
EXPLODED VIEW
Only for training and service purposes
GP4LS7LR22011.12.01
Copyright 2012 LG Electronics. Inc. All rights reserved
LGE Internal Use Only
Normal Power
Only for training and service purposes
VDDC
Normal
FROM LIPS & POWER B/D
PowerDET
+3.3VNormal
+1.5VDDR
IR/LED and control for normal models
Only for training and service purposes
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC
Copyright 2012 LG Electronics. Inc. All rights reserved
USB SIDE
USB1DIODES
USB2DIODES
Only for training and service purposes
HDMI
Only for training and service purposes
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC
Copyright 2012 LG Electronics. Inc. All rights reserved
RGB-PC / SPDIF
Only for training and service purposes
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION
RS-232C
COMMERCIAL/NonOS MODEL OPTION COMMERCIAL MODEL OPTION
For Comsumer model, use 4PIN Wafer
Only for training and service purposes
LVDS for large inch
Only for training and service purposes
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC
Copyright 2012 LG Electronics. Inc. All rights reserved
Only for training and service purposes
S7LR2DIVXMS10
GP4LS7LR22011/06/03 DDR25612
Copyright 2012 LG Electronics. Inc. All rights reserved
Serial Flash for SPI boot
Only for training and service purposes
Copyright 2012 LG Electronics. Inc. All rights reserved
LGE Internal Use Only
Headphone *Option HEADPHONE
Only for training and service purposes
Copyright 2012 LG Electronics. Inc. All rights reserved
LGE Internal Use Only
CI Region
Option name of this page CISLOT because of Hong Kong
Only for training and service purposes
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
H/W option ETHERNET
GP4LS7LR22011/06/14 ETHERNET21
Only for training and service purposes
ETHERNET
GP4RGLOBALTUNERBLOCK
Only for training and service purposes
TU2602TU2603 TDSS-G101D TDSN-G301D
TU2601
DVB-S2 LNB Part Allegro
OptionLNB
GP4LS7LR22011/11/02 DVBS27
Only for training and service purposes
SCART / COMPONENT&COMPSIT
FULL SCART / COMPONENT1
Only for training and service purposes
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
AUDIO AMPSTA380BWE
Only for training and service purposes
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC
Copyright 2012 LG Electronics. Inc. All rights reserved
Page
Contents of LCD TV Standard Repair Process
Contents of LCD TV Standard Repair Process Detail Technical Manual
Continue to the next page
Error symptom
Content
A. Video error
LCD TV
Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable
A2 Check Power Board 24v output
A. Video error
voltages of Power
Only for training and service purposes
LCD TV
A. Video error
By using Digital signal level meter By using Diagnostics menu on OSD
Menu→ Set up→ Support → Signal Test Signal strength Normal over 50%
Signal Quality Normal over 50%
A. Video error
LCD TV
→ Set-Top-Box, Different maker TV etc
A8/ A9
A. Video error
LCD TV
Check color by input -External Input COMPONENT -RGB
External device screen error-Color error
A. Video error
Vertical/Horizontal bar, residual image, light spot
LCD TV
B. Power error
Check Power LED
Check Power On ‘”High”
Measure voltage of each output of Power B/D
B. Power error
Check Power Off Mode
If Power Off mode is not displayed Check Power B/D voltage
POWEROFFABNORMAL1
C. Audio error
24V of Power
LCD TV
Check user menu Speaker off
C. Audio error
In case of External Input signal error Check and fix external device
LCD TV
Check audio B+ Voltage
D. Function error
1. Remote controlR/C operating error
LCD TV
Check & Repair
D. Function error
Check input signal
Y Check technical Signal information input? - Fix information
Recognition error
E. Noise
LCD TV
Identify nose type
F. Exterior defect
LCD TV